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Example usage of Lollipop's PathParser #6

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Example usage of Lollipop's PathParser #6

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2 changes: 1 addition & 1 deletion application/build.gradle
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ android {
buildToolsVersion "21.1.1"

defaultConfig {
minSdkVersion 17
minSdkVersion 14
targetSdkVersion 21
versionCode 1
versionName "1.0"
Expand Down
145 changes: 145 additions & 0 deletions application/src/main/java/org/curiouscreature/android/roadtrip/AlternateStateView.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,145 @@
/**
* Copyright 2013 Romain Guy
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.curiouscreature.android.roadtrip;

import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.View;

public final class AlternateStateView extends View {
private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

private SVGPath svgPath;
private int mSvgResource;

private float mPhase;
private float mFadeFactor;
private int mDuration;
private float mParallax = 1.0f;
private float mOffsetY;

private ObjectAnimator mSvgAnimator;

public AlternateStateView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public AlternateStateView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);

mPaint.setStyle(Paint.Style.STROKE);

TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.IntroView, defStyle, 0);
try {
if (a != null) {
mPaint.setStrokeWidth(a.getFloat(R.styleable.StateView_strokeWidth, 1.0f));
mPaint.setColor(a.getColor(R.styleable.StateView_strokeColor, 0xff000000));
mPhase = a.getFloat(R.styleable.StateView_phase, 1.0f);
mDuration = a.getInt(R.styleable.StateView_duration, 4000);
mFadeFactor = a.getFloat(R.styleable.StateView_fadeFactor, 10.0f);
}
} finally {
if (a != null) a.recycle();
}
}

private void updatePathsPhaseLocked() {
final int count = svgPath.pathList.size();
for (int i = 0; i < count; i++) {
// SvgHelper.SvgPath svgPath = mPaths.get(i);
final Path path = svgPath.pathList.get(i);
path.reset();
svgPath.measureList.get(i).getSegment(0.0f, svgPath.lengthList.get(i) * mPhase, path, true);
path.rLineTo(0.0f, 0.0f);
// svgPath.measure.getSegment(0.0f, svgPath.length * mPhase, svgPath.renderPath, true);
// Required only for Android 4.4 and earlier
// svgPath.renderPath.rLineTo(0.0f, 0.0f);
}
}

public float getParallax() {
return mParallax;
}

public void setParallax(float parallax) {
mParallax = parallax;
invalidate();
}

public float getPhase() {
return mPhase;
}

public void setPhase(float phase) {
mPhase = phase;
updatePathsPhaseLocked();
invalidate();
}

public int getSvgResource() {
return mSvgResource;
}

public void setSvgResource(int svgResource) {
mSvgResource = svgResource;
}

@Override
protected void onSizeChanged(final int w, final int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
svgPath = PathParserHelper.loadPathList(getContext(), mSvgResource,
w - getPaddingLeft() - getPaddingRight(), h - getPaddingTop() - getPaddingBottom());
updatePathsPhaseLocked();
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);

if (svgPath == null) {
return;
}

canvas.save();
canvas.translate(getPaddingLeft(), getPaddingTop() + mOffsetY);
final int count = svgPath.pathList.size();
for (int i = 0; i < count; i++) {
final Path path = svgPath.pathList.get(i);
int alpha = (int) (Math.min(mPhase * mFadeFactor, 1.0f) * 255.0f);
mPaint.setAlpha(alpha);
canvas.drawPath(path, mPaint);
}
canvas.restore();
}

public void reveal(View scroller, int parentBottom) {
if (mSvgAnimator == null) {
mSvgAnimator = ObjectAnimator.ofFloat(this, "phase", 0.0f, 1.0f);
mSvgAnimator.setDuration(mDuration);
mSvgAnimator.start();
}

float previousOffset = mOffsetY;
mOffsetY = Math.min(0, scroller.getHeight() - (parentBottom - scroller.getScrollY()));
if (previousOffset != mOffsetY) invalidate();
}
}
18 changes: 9 additions & 9 deletions application/src/main/java/org/curiouscreature/android/roadtrip/MainActivity.java
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,7 @@
import java.util.ArrayList;
import java.util.List;

@SuppressWarnings("ConstantConditions")
@SuppressWarnings({"ConstantConditions", "deprecation"})
public class MainActivity extends Activity {
private static final boolean ANIMATE_BACKGROUND = false;

Expand All @@ -49,17 +49,17 @@ private static class State {
}

private final State[] mStates = {
new State(R.color.az, R.raw.map_az, new int[] {
new State(R.color.az, R.array.map_az, new int[] {
R.drawable.photo_01_antelope,
R.drawable.photo_09_horseshoe,
R.drawable.photo_10_sky
}),
new State(R.color.ut, R.raw.map_ut, new int[] {
new State(R.color.ut, R.array.map_ut, new int[] {
R.drawable.photo_08_arches,
R.drawable.photo_03_bryce,
R.drawable.photo_04_powell,
}),
new State(R.color.ca, R.raw.map_ca, new int[] {
new State(R.color.ca, R.array.map_ca, new int[] {
R.drawable.photo_07_san_francisco,
R.drawable.photo_02_tahoe,
R.drawable.photo_05_sierra,
Expand Down Expand Up @@ -125,7 +125,7 @@ private void handleScroll(ViewGroup source, int top) {
View item = container.getChildAt(i);
View v = item.findViewById(R.id.state);
if (v != null && v.getGlobalVisibleRect(mTempRect)) {
((StateView) v).reveal(source, item.getBottom());
((AlternateStateView) v).reveal(source, item.getBottom());
}
}
}
Expand Down Expand Up @@ -162,9 +162,9 @@ private void removeOverdraw(View decorView, float alpha) {
}
if (alpha >= 1.0f && decorView.getBackground() != null) {
mWindowBackground = decorView.getBackground();
decorView.setBackground(null);
decorView.setBackgroundDrawable(null);
} else if (alpha < 1.0f && decorView.getBackground() == null) {
decorView.setBackground(mWindowBackground);
decorView.setBackgroundDrawable(mWindowBackground);
mWindowBackground = null;
}
}
Expand Down Expand Up @@ -210,7 +210,7 @@ private void addState(LayoutInflater inflater, LinearLayout container, final Sta
final int margin = getResources().getDimensionPixelSize(R.dimen.activity_peek_margin);

final View view = inflater.inflate(R.layout.item_state, container, false);
final StateView stateView = (StateView) view.findViewById(R.id.state);
final AlternateStateView stateView = (AlternateStateView) view.findViewById(R.id.state);
stateView.setSvgResource(state.map);
view.setBackgroundResource(state.background);

Expand Down Expand Up @@ -265,7 +265,7 @@ public void onScrollChanged(TrackingHorizontalScrollView source,

private void removeStateOverdraw(View stateView, State state, float alpha) {
if (alpha >= 1.0f && stateView.getBackground() != null) {
stateView.setBackground(null);
stateView.setBackgroundDrawable(null);
stateView.findViewById(R.id.state).setVisibility(View.INVISIBLE);
} else if (alpha < 1.0f && stateView.getBackground() == null) {
stateView.setBackgroundResource(state.background);
Expand Down
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